The device also has the ability to automatically enter “Deep Standby” whenever the wired network connection is removed for more than 60 minutes in Quick Start Mode. Power indicator will turn off during Deep Standby. To “wake” a HEOS device from Deep Standby, you must press the standby button which will immediately turn on Power indicator.
Power button for more than 6 seconds, the device enter Deep Standby.
“Deep Standby” needs to be set in all four zones to enable this setting.